Interlacing jet

ABSTRACT

Apparatus for intermingling filaments in a yarn, the apparatus having a control passageway therethrough, a slot parallel thereto opening into the passageway and two ducts opening into the passageway, the ducts being on one side of a plane through the center of the slot and having axes converging through the plane to a region within the passageway and beyond its center line.

United States Patent 91 both of Harrogate, Yorkshire, En-

Appl. No.: 141,714

U.S. C] ..226/97, 302/29 Int. Cl. ..B65h 17/32 Field of Search ..302/31, 29; 226/97 References Cited UNITED STATES PATENTS l1/l957 Pape ..226/97 n11 3,73fifi13 McDermott et al. 1 May 1, 1973 54] INTERLACING JET 2,880,457 4/1959 Schuller ..226/97 x [75] Inventors: Peter McDermott; Colin Campbell,

Primary Examiner-Richard E. Aegerter Assistant Examiner-Hadd S. Lane AttorneyCushman, Darby & Cushman [57] ABSTRACT Apparatus for intermingling filaments in a yarn, the apparatus having a control passageway therethrough, a slot parallel thereto opening into the passageway and two ducts opening into the passageway, the ducts being on one side of a plane through the center of the slot and having axes converging through the plane to a region within the passageway and beyond its center line.

3 Claims, 2 Drawing Figures PATENTEUMY H I 7 3,730,413

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INTERLACING JET This invention relates to apparatus for interlacing or intermingling the filaments in an advancing filament yarn by the use of air jets.

In one form of such interlacing apparatus, a filament yarn is passed through a passageway into which air jets are injected through ports. It is convenient for the purpose of threading up the yarn to provide a slot, sometimes referred to as a string-up slot extending parallel to the passageway and communicating therewith, but then difficulty is experienced due to a tendency for the air jets to blow the yarn occasionally out of the passageway through the slot.

According to this invention we provide apparatus for interlacing filament yarn comprising a yarn passageway with a string up slot and fluid ducts opening into ports within an arc of 180 in the passageway wall on one side of the axis ofthe string up slot, such ducts converging to a region beyond the central axis of the passageway. Stated another way, the ducts are all disposed on one side of the plane through the center of the slot, and the ducts have axes converging through that plane to a region within the passageway and beyond its center line.

We prefer that the interlacing fluid jets, most conveniently air jets, also provide a forwarding or ejector action on yarn in the passageway by being angled with respect to the passageway axis. We also prefer to use two intermingling and forwarding jets, within an angle of 60 The string up slot may be on a projected diameter of the passageway cross section but we prefer it to be on a projected chord, and for the ducts to converge to a point or region on or near a perpendicular from the passageway axis to the projection of the string up slot axis into the passageway.

For the better understanding of the invention one embodiment will be described by way of example with reference to the drawing accompanying the provisional specification in which:

FIG. 1 is a sectional view of an interlacing apparatus in the plane of the yarn passageway and FIG. 2 is a sectional view on the line II-II of FIG. 1.

Between two abutting members 1 and 2 held together by means not shown are a yarn passageway 3 and a string up slot 4. In member 1 is a compressed air chamber 5 supplied with air by means not shown, and connected to the yarn passageway 3 by two ducts 6.

The ducts 6 are angled as shown in FIG. 1 to provide for fluid forwarding action and converge in the plane of FIG. 2 to a point beyond the passageway axis.

We prefer to form the passageway between two abutting members as illustrated in the drawing.

For interlacing a variety of filament yarns, for instance polyethylene terephthalate yarns from to 500 decitex, we prefer to use a one inch long passageway of diameter 0.125 inch, a 0.005 inch wide string up slot with a projected axis spaced 0.036 inch from the passageway axis, and two interlacing jet ducts of 0.040 inch diameter converging at 45.

What we claim is:

1. In apparatus for intermingling the filaments in a filament yarn, said apparatus having a passageway extending therethrough with a substantially linear center.

line and a slot extending therethrough substantially parallel with that center line and opening into the passageway and at least two ducts opening into the passageway, whereby a continuousl advancin filament yarn may be in reduced throug the slot in o the passageway and be subjected to the filament intermingling action of fluid forced through the ducts, the improved arrangement wherein the ducts are all on one side of the plane through the center of the slot and wherein the ducts have axes converging through that plane to a region within the passageway and beyond its center line.

2. Apparatus according to claim 1 in which the ducts are angled with respect to the passageway axis to provide for fluid forwarding action on the yarn.

3. Apparatus according to claim 1 in which there are two ducts converging at an angle between their axes of less than 60. 

1. In apparatus for intermingling the filaments in a filament yarn, said apparatUs having a passageway extending therethrough with a substantially linear center line and a slot extending therethrough substantially parallel with that center line and opening into the passageway and at least two ducts opening into the passageway, whereby a continuously advancing filament yarn may be introduced through the slot into the passageway and be subjected to the filament intermingling action of fluid forced through the ducts, the improved arrangement wherein the ducts are all on one side of the plane through the center of the slot and wherein the ducts have axes converging through that plane to a region within the passageway and beyond its center line.
 2. Apparatus according to claim 1 in which the ducts are angled with respect to the passageway axis to provide for fluid forwarding action on the yarn.
 3. Apparatus according to claim 1 in which there are two ducts converging at an angle between their axes of less than 60*. 